This NEW 1000 watt pure sine power inverter will supply power to all types of electronic equipment without distortion of input power that can cause connected equipment failure or operation issues. 2500 watt power surge for 30 sec. It has a unique built in transfer switch that prevents inverter damage if alternate land power is also connected to the 120 volt outlets at the same time as inverter power is on. A stand alone transfer switch can cost well over $250. The internet price for this unit is $ 449 -$527.95 US ( Furrion.com) 2 left at this special dealer cost price with no additional taxes We also install these units